Assertion (A): \(Cu^{2+}\) iodide is not known.
Reason (R): \(Cu^{2+}\) oxidises  \(I^-\) to iodine.
 
1. Both (A) and (R) are True, and (R) is the correct explanation of the (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is not True but (R) is True.
4. Both (A) and (R) are False.
Hint: Cu2+ oxidises I- to iodine.
Iodide ions are strong reducing agents. Therefore, Copper (II) Iodide is converted into Cu2I2 and I2.  Cu2+ oxidises I- to iodine is also a correct explanation
2CuI2Cu2I2 + I2
Hence, both assertion and reason are true, and the reason is the correct explanation of the assertion.